Stoneweft is a turn taking game with an appeal similar to chess, it was a tangent project based on the combat rules of Stoneweaver. I wanted a way to play it online, with AI or against friends, and so I set up a web game version of the complete ruleset!
Its fully configurable and server authoritative, running over websockets using Flasks SocketIO. The game itself is written in python, with the exception of the opponent AI, which is written as a C module to speed up Alpha-Beta pruning. It also has lots of nice QOL, like auto re-joining games if you accidentlly close the tab, and locally remembering your pre-game board!
The project is still live, but it is no longer public. I had ongoing issues with crawlers and scraping bots that would not follow my site policies, and it had dramatically slowed down my server response time.